Warm up 4/9

• Where did this air mass come from and how did it get here?

Air mass

• Large body of air that has same qualities through out

• Form by sitting over one large area for a while

• Moisture , temperature

• Cold, warm, hot, super cold

• humid, dry

Types affecting USA

• mT – maritime tropical, warm, forms over water

• cT – continental tropical over land, warm

• mP- maritme polar, over water, cold

• cP – cold over land

• Equitorial

• arctic

Fronts

• Boundary between air masses

• Cold front – cold air mass pushes into warm air mass

• Warm front – warm pushes into cold

Remember - Cloud types/angle of fronts

• Cold front – steep, cumulonimbus clouds

• Warm front – shallow, cirrus, altostratus, nimbostratus

Station model

Tornados

• 1950’s US Weather Bureau

• Educate people on tornado science and safety

• Warning system

• 1953, Waco, Texas was last time a single tornado killed more than 100 people

remember

• 1953 was the last time over 100 people died from a single tornado – Why?

remember

• Watch versus warning

• How are hurricanes and tornadoes alike?

Warm up

• What do meteorologists need to consider when making forecasts?

Clouds

• Day – clouds block heat from sun– Clouds allow heat to reach Earth– Nights trap heat – No clouds – heat escapes

• Front = boundary, cold/moist = condensation - ppt

format

• Multiple choice – 16• Station model, pg. 457,

• Open response – choose some• Map - interpret

• What’s the difference between weather & climate

Begin climate

climate

• Average conditions in an area over 30 years

Climate vs Weather

• Weather is the immediate conditions of the atmosphere

• Temp• Humidity• Wind speed & direction• Dew point• Barometric pressure• Cloud type & cover

Warm Ups

• What climate controls effect Boston’s climate the most?

Climate controls

Landforms

Latitude

Land/water

Ocean/wind currents

Elevation

Landforms

• Mountain effect – air / moisture levels change with altitude

• Winds are effected/blocked/formed by mountains

Latitude

• Closer to equator get more solar radiation

• Poles get less

• Seasonality increases with latitude

• Affects the length of day

Land/Water

• Land & water absorb & release heat at different rates

• Form land & sea breezes

• Proximity to large bodies of water moderates temperature extremes

Elevation

• Increase altitude, cooler air

Ocean/Wind Currents

• The water and the air are constantly moving. The movement can be across, up, or down. This process circulates cool or warm air and water around Earth.

Warm up 4/30

• What evidence of climate change exists in Boston?

Evidence of climate change

• Boston was covered by glaciers in ice ages

• Roxbury Conglomerate, Franklin Park, Mission Hill

• Glacial errata, moraines, ect..

• Jamaica Pond – kettle lake, formed by a trapped chunk of ice as the ice retreated after glaciation

El Nino

• El Nino – weather pattern caused by the reversal of current in the Pacific ocean, changing the direction of the winds, dry areas get rain, humid areas get drought

What climate controls effect Boston the most?

• Landforms• Latitude• Land/water• Ocean/wind currents• Elevation• Vegetation

What things could change climate?

• Drought – only if longer than 30 years

• Volcano – if rate of eruptions change for a more than 30 years

• Pangaea separating

Quest format

• Multiple choice

• Map

• Open response